213121130 has 8 divisors (see below), whose sum is σ = 383618052. Its totient is φ = 85248448.

The previous prime is 213121127. The next prime is 213121133. The reversal of 213121130 is 31121312.

It is an interprime number because it is at equal distance from previous prime (213121127) and next prime (213121133).

It can be written as a sum of positive squares in 2 ways, for example, as 198612649 + 14508481 = 14093^2 + 3809^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213121133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10656047 + ... + 10656066.

Almost surely, 2^213121130 is an apocalyptic number.

213121130 is a deficient number, since it is larger than the sum of its proper divisors (170496922).

213121130 is a wasteful number, since it uses less digits than its factorization.

213121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21312120.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 213121130 is about 14598.6687749260. The cubic root of 213121130 is about 597.3224486013.

Adding to 213121130 its reverse (31121312), we get a palindrome (244242442).

The spelling of 213121130 in words is "two hundred thirteen million, one hundred twenty-one thousand, one hundred thirty".